Login.pm in Barracuda Spam Firewall (BSF) 3.3.01.001 through 3.3.03.053 contains a hard-coded password for the guest account, which allows remote attackers to read sensitive information such as e-mail logs, and possibly e-mail contents and the admin password.
https://exchange.xforce.ibmcloud.com/vulnerabilities/28213
http://www.vupen.com/english/advisories/2006/3104
http://www.securityfocus.com/archive/1/442039/100/0/threaded
http://www.securityfocus.com/archive/1/441857/100/0/threaded